MESON Chess Problem Database

Problem Display
PID: 193846 (3K4/5R2/8/1p6/1B1p4/8/2PpkpN1/Q3N3 w - - 0 1)

Marble, Murray

Chess News, 1916

3K4/5R2/8/1p6/1B1p4/8/2PpkpN1/Q3N3

#2

7 + 5

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Sd3?
      • threat
        • 2.Rxf2#
      • 1...f1Q
        • 2.Qxf1#
      • 1...f1S
        • 2.Rf2#
        • 2.Qxf1#
      • 1...f1B
        • 2.Rf2#
        • 2.Qxf1#
      • 1...f1R
        • 2.Qxf1#
      • 1...d1S!
  • Keys
    • 1.Qxd4!
      • 1...Kd1
        • 2.Qxd2#
      • 1...Kf1
        • 2.Qxf2#
      • 1...dxe1Q
        • 2.Qd3#
      • 1...dxe1S
        • 2.Rxf2#
      • 1...dxe1B
        • 2.Qd3#
      • 1...dxe1R
        • 2.Rxf2#
        • 2.Qd3#
      • 1...fxe1Q
        • 2.Qg4#
      • 1...fxe1S
        • 2.Qxd2#
      • 1...fxe1B
        • 2.Qg4#
      • 1...fxe1R
        • 2.Qxd2#
        • 2.Qg4#
      • 1...d1Q
        • 2.Rxf2#
      • 1...d1S
        • 2.Qd3#
      • 1...d1B
        • 2.Rxf2#
        • 2.Qxf2#
        • 2.Qd3#
      • 1...d1R
        • 2.Rxf2#
      • 1...f1Q
        • 2.Qxd2#
      • 1...f1S
        • 2.Qg4#
      • 1...f1B
        • 2.Qxd2#
        • 2.Qg4#
      • 1...f1R
        • 2.Qxd2#

This anticipates 74724(1973)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 14
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • R1(F),XP(c)
      • Vars
        • P(c);::QAB1(A),XQ(c)
        • P(c);::QAB1(A),XR(c)
      • Refutation
        • P(a);
  • Actual
    • Q(A);XP(d)
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::QAR1(A),XP(a)
      • K(b);P_SPINP(c),S_FLIGHT::QAR1(A),XP(c)
      • P(a);XS(B)::QAB1(A)
      • P(a);XS(B)::R1(F),XP(c)
      • P(c);XS(B)::QAB(A)
      • P(c);XS(B)::QAR1(A),XP(a)
      • P(a);P_PINQ(A)::R1(F),XP(c)
      • P(a);::QAB1(A)
      • P(c);::QAR1(A),XP(a)
      • P(c);::QAB(A)
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